Compound for producing silk-like effects.



LEON LILIENFELD, 0F VIENNA, AUSTRIA-HUNGARY.

COMPOUND FOR PRODUCING SILK-LIKE EFFECTS.

No Drawing.

Specification of Letters Patent.

Patented May 31, 1910.

Application filed May 4, 1907. Serial No. 371,765.

To all whom it may concern:

Be it known that I, LEON LILIENFELD, scientific chemist, a subject ofthe Emperor of Austria-Hungary, and a resident of Zeltgasse 1, ViennaVIII, in the Empire of Austria-Hungary, have invented new and usefulImprovements Relating to Compounds for the Production of Silk-LikeEfiects; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same. a

The invention relates to coloring matter for producing silk-like orpearl-luster efiects, and such, for instance, as described in theLetters Patent of the United States, No. 834,739, granted to me onOctober 30, 1906.

The object of the present invention is to provide a new andimproved'coloring matter for producing silk-like or pearl-luster effectswhen applied to various articles made of wood, metal, paper, leather,textile fab- IlCS, etc. A

The coloring matter consists essentially of finely pulverized mica and acompound formed of viscose and a metal of the magnesium group.

I have found that the compounds of viscose with the metals of themagnesium group, and in particular the zinc salt of viscose, presentgreat advantages for the present process as compared with viscose per86.

The advantages of the compounds of viscose with the metals of themagnesium group, and in particular zinc, as compared with viscose, areas follows: 1. Elimination of a cleaning or washing process of thesupports provided with the layers. 2. Less alkalinity; an advantagewhich is of importance not only to the supports, but also to any addeddye stufi.

As is well known the raw viscose contains numerous impurities and if theraw viscose is used as an element in forming the coloring matter, it isfirst necessary to Wash or clean the material to free it from impuritiesbefore applying the coloring matter. This washing or cleaning process isexpensive be sides being troublesome, especially when the material to becolored is paper in rolls or the like. When the coloring matter isformed with a compound of viscose and a metal of the magnesium groupthen the washing or cleaning process is not necessary as the compound 1sfree of lmpurltles. The raw viscose contalns a rather large percentageof alkalies, while the compounds of viscose with the metals of themagnesium group contain a very small percentage of alkalies, or, in somecases, they merely contain'ammonia and no caustic alkalies. From theforegoing it-is evident that if the viscose compounds are used informing the coloring matter, the material to which the coloring matteris applied, sufiers less than when coated with a coloring matter havingraw viscose as an element. The desired color is given to the coloringmatter by the addition of a suitable pigment.

The process is carried into practice by employing in place of theviscose protected in the main Patent No. 834739, the viscose zinc saltobtained by precipitating a neutral or slightly acid viscose with a zincsalt solution dissolved in dilute alkalies, ammonia, solutions ofalkaline salts etc.

What I claim as my invention and desire to secure by Letters Patent is:

1. Coloring matter for producing silk-like efiects, consisting of amixture of mica and a compound formed of Viscose and a metal of themagnesium group.

2. Coloring matter for producing silk-like effects, consisting of amixture of finely pulverized mica and a zinc salt of viscose.

3. Coloring matter for producing silk-like effects, consisting of amixture of pulverized mica and a zinc salt, of viscose obtained byprecipitating a neutral or slightly acid viscose with a zinc saltsolution dlssolved in dilute alkalies, ammonia, solutions of alkaline.salts and the like.

4. Coloring matter for producing silk-like eflects, consisting of amixture of mica and a compound formed of viscose and a metal of themagnesium group, and pigments.

5. Coloring matter for producing silk-like effects, consisting of amixture of finely pulverized mica and a zinc salt of viscose, andpigments.

In testimony whereof I have signed my name to this specification in thepresence of two subscribingwitnesses.

LEON LILIENFELD.

Witnesses:

WENZEL SINKE, RoBT. W. HEINGARTNER.

